Thanksgiving isn't until next week and the temperature outside is summer-like, but that didn't stop 3-year-old Nathan Hartman of Simi Valley from thinking it was Christmas on Thursday inside the Ronald Reagan Presidential Library and Museum.

Walking into a roomful of Christmas trees, Nathan's eyes lit up as he pointed to the gingerbread men ornaments on the tree representing Germany. His mother, Carla Hartman, read an information card explaining to Nathan how people in Germany celebrate Christmas and that former President Ronald Reagan visited the country three times during his term.

"Maybe one day he'll really understand the story and history behind these trees," she said.

"But right now, he just likes all the colors and trinkets on the trees. To him, it represents that time of the year."

The Christmas trees are part of the "Christmas Around the World" display, which opened Thursday at the museum and will run until Jan. 6. Several menorahs, given to President Reagan while in the White House, are also on display.

Many of the docent-led group tours for the display are booked, but the public can take self-tours, officials said. The museum has extended its hours through December to accommodate larger attendance numbers during the holidays.

Each of the 26 trees are decorated to reflect a country Reagan visited while in office. The Korean tree was festooned with lanterns and purses from the country, while the Iceland tree is covered with icicle ornaments.

The cards accompanying the trees explained that children can expect gifts from Santa Claus, Saint Nicholas or the Christ Child, depending on what country they are from.

Many of the decorations on the trees were given to the Reagans as gifts or were donated by people from those countries throughout the 14 years the display has been held at the library, said Lauren Arias, program specialist at the library.

Arias said many of the trees are decorated by people from the countries represented.

"There's a lot of community input and support with this program. It gives each tree a personal and unique touch," Arias said.

The Lithuanian tree was decorated by Valerie and Jonas Ruzgys of Anaheim and their grandchildren. Valerie Ruzgys said her family has been decorating the tree for 12 years with intricate ornaments made of drinking straws.

"It's just something we enjoy doing and it represents where we're from," she said.

The red, white and blue United States tree was popular with Shirley Allsman and Julie Karson from Saugus, and Barbara Johnson of Newhall, who visited the display as part of a tour organized by the Santa Clarita Methodist Church.

"It's very impressive," said Allsman. "It's cheerful and bright. It really gets you into the Christmas spirit."

Before seeing the trees, the group visited a display of Nancy Reagan's clothing called "A First Lady's Style," which is at the museum until Nov. 10, 2008.

Arias said more than 54,000 people visited the "Christmas Around the World" display last year.

Admission to the museum, which includes the "Christmas Around the World" display, is $12 for general admission, $9 for seniors 62 and over, $3 for children ages 11 through 13, and free for children under 10.